Hm.. Verry interesting. Honestly, I'm kinda in a rush, so I'll just post a couple of things.
Mainly: I think You should make Roserade more offensive; I feel like it can kill your momentum sometimes... But that's just me... Anyway, I say try Sludge Bomb > T-Spikes, or, if you really want T-spikes, make Porygon2 more offensive.
Also, Scarf Raikou seems a bit like overkill; Y not SubCM? that could help a bit with threats. That's all I really see wrong with this team; Good Luck, sorry for crappy post ):
@Arcticblast: Hey Closet, guess who's above you?